/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.queryengine.execution.operator.source.relational.aggregation.grouped;

import org.apache.iotdb.db.queryengine.execution.operator.source.relational.aggregation.AggregationMask;

import org.apache.tsfile.block.column.Column;
import org.apache.tsfile.block.column.ColumnBuilder;

public interface GroupedAccumulator {

  long getEstimatedSize();

  void setGroupCount(long groupCount);

  void addInput(int[] groupIds, Column[] arguments, AggregationMask mask);

  void addIntermediate(int[] groupIds, Column argument);

  void evaluateIntermediate(int groupId, ColumnBuilder columnBuilder);

  void evaluateFinal(int groupId, ColumnBuilder columnBuilder);

  /**
   * This interface will be used for order by in agg function (not implemented), implementations are
   * all empty now.
   */
  void prepareFinal();

  void reset();

  default void close() {
    // do nothing
  }
}
